Resurfacing tool

ABSTRACT

This invention consists of an electric motor or its equivalent mounted on one end of a tubular hand grip whose other end supports mechanism having two blades that are moved in and out laterally on the downwardly disposed front end of the support for this mechanism, the mechanism consisting of three spur gears so arranged that one of the gears is connected to the forward end of the shaft of the motor. The last-mentioned gear rotates the other two gears which in turn, by means of a new and novel linkage, moves the two aforesaid blades back and forth over whatever surface to which the tool is held.

I United States Patent [191 [111 3,763,562 Schultz Oct. 9, 1973 RESURFACING TOOL I Primary Examiner-Donald G. Kelly [76] Inventor: Robert C. Schultz New'n ton, Assistant a Peters Comm l g AttorneyDonald K. Huber [22] Filed: Feb. 15, 1972 T [21] Appl. No.: 226,585 [57] ABS RACT This invention consists of an electric motor or its I equivalent mounted on one end of a tubular hand grip [52] US. Cl 30/166, 30/l7s2illlzgl irt whose other end supports mechanism having two I t C] B23, 49/16 blades that are moved in and out laterally on the 58 d 0 166 169 downwardly disposed front end of the support for this 1 o earc 272 mechanism, the mechanism consisting of three spur gears so arranged that one of the gears is connected to R f C1 d the forward end of the shaft of the motor. The laste erences mentioned gear rotates the other two gears which in UNITED STATES PATENTS turn, by means of a new and novel linkage, moves the 2,984,908 5/1961 Dyer 30/172 X two aforesaid blades back and forth over whatever 2,064,676 12/1936 MacLeod 30/369 surface to which the tool is held. 3,272,023 9/1966 Ferguson 30/272 R X 3 Claims, 6 Drawing Figures RESURFACING TOOL This invention relates to hand tools; more particularly, to hand tools especially made to hone machine ways and other metal surfaces; still more particularly, to hand tools of the character herein described that are activated by an electric motor enclosed within the handle of the tool, the motor ccluld if desired be operated by air or by some other medium.

It is the principal object of this invention to provide a resurfacing tool to which different blades can be secured in order to do different types of work.

Another object of this invention is to provide a resurfacing tool of the character herein described that not only has a minimum number of accessible parts but is also a tool having a minimum number of adjustments.

Still another object of this invention is to provide a resurfacing tool that can be used for honing metal and can also be adapted to polishing, sanding, scrubbing and other types of metal finishing, as may hereinafter be described. a

These and other objects, features, and advantages of this invention will become apparent from a reading of the following detailed description when taken in connection with an examination of the accompanying drawing, in which:

FIG. I is a perspective view of this invention in its preferred form and ready for use.

FIG. 2 is an underside view of FIG. 1.

FIG. 3 is an exploded perspective view of one of the blades and the blade holder portion of this invention.

FIG. 4 is a perspective view of the rear portion of that part of this invention indicated by the arrowed line and number 4 in FIG. 2.

FIG. 5 is a perspective view of one of the blades of this invention.

a shoulder on the forward end thereof or else is provided with a short sleeve, as one can see by looking at FIG. 2 of the accompanying drawing.

The drawing of this novel invention clearly shows that the working edge of the two blades of the tool may be of any desired configuration depending of course on the purpose for which the tool is to be used. For example, the blades 24, illustrated in FIG. I of the drawing, have a plurality of teeth on the lower edge thereof while the blade 26 shown in FIG. 5 has a rounded edge 27 and the blade 28 in FIG. 6 has a plurality of equally spaced and parallel U-shaped recesses 29 therein for use on enamel surfaces. A part that I call a blade clamp 30is located in the position shown in FIG. 1 of the accompanying drawing. Its purpose is to firmly hold the blades on the aforesaid blade support 23 by means of two spaced and parallel screws 3]. Although not shown in any of the views of the drawing, shims that are approximately 0.005 inch thick may be placed behind the aforesaid blades when they are mounted on the blade support 23, as will be understood by those experienced FIG. 6 is a perspective view of another type of blade that can be used in this invention.

Directing ones attention first to FIG. 2 of the accompanying drawing it will be seen that this invention 10 in its preferred form consists of a small electric motor 11 from which forwardly extendsa shaft 12 that is totally enclosed by a tubular hand grip 13. A tool support 14, having a downwardly extending front edge 15, is suitably secured to the front end 16 of the aforesaid tubular hand grip 13. A rectangular mechanism support bar 16' is suitably secured to the underside of the aforesaid tool support 14 by two spaced headless screws 17 or the like. The outer end of the aforesaid shaft 12, which has the spur gear 18 secured thereto, is supported by the aforesaid mechanism support bar 16', as one can see by examination of FIG. 2 and FIG. 4 of the drawing.

' the just-mentioned gear link 22 also being secured by a pin to the outer end of a tool holder or blade support 23 that is clearly shown in FIG. 3 of the accompanying drawing. Each blade support 23 is slidably mounted in the previously-mentioned front edge 15 of the aforesaid tool support 14, as one can see by looking at FIGS. 1 and 2 of the drawing. Although not previously mentioned, each aforesaid stub shaft 19 is either made with in the an.

The way in which this invention of mine is assembled and works is so cearly illustrated in the accompanying drawing as to need no further explanation in this specification to those experienced in the art other than to state that it is obvious that the electric plug mustbe plugged into a source of electricity in order that the aforesaid electric motor 11 will receive its electricity through the electric wires (cord) 32 and that the motor will be activated by operation of the switch 33 in the aforesaid tubular hand grip l3.

For those less experienced in the art, it should be realized that when the aforesaid electric plug has been plugged into a source of current and the tool taken in hand and held over an object whose finish it is desired to improve, and the aforesaid switch 33 is turned on, the aforesaid electric motor 11 will rotate the shaft 12, and by means of the mechanism previously described and illustrated in FIGS. 2 and 4 of the accompanying drawing, the two opposed blades 24 will move laterally back and forth but not touching each other and that this action of the lower edges of the blades on the surface on which this tool is held will produce the desired finish on the surface. The tool is naturally moved over the entire surface to be finished.

FIG. 3 shows an adjustment screw threadably carrying two nuts. This assembly is indicated at 34 and has not previously been mentioned. If desired, two of these assemblies may be secured to the front end 15 of the tool support 14 to enable the operator to better control the height of the tool above the surface being worked on. That is, one assembly 34 is attached to one side of the front end 15, by fixing the two nuts to the front end, and the other assembly 34 is likewise attached to the other side of the front end. Thereafter, by threading the two screws of the assemblies 34 into and out of their associated nuts the elevation of the front end 15 above the work surface may be varied.

It is to be understood that this new and novel tool can also be used for stripping paint, wood, or any other suitable surface as well as for making a square or rectangular opening in a piece of wood or the like merely by moving the tool back and forth across the wood the desired length and width of the required opening or recess. The aforesaid adjustment screws 34 having been removed, the tool can also be used for sawing off broad surfaces of wood or the like as well as for cutting into the surfaces as may be desired by the operator of the tool. In fact, there is practically no limit to the uses of this new and novel tool by those experienced in the art of handling a tool which cuts and/or scrapes by means ofa back and forth motion of the hand holding the tool.

This invention is subject to any desired change in detail design and/or modification that one may care to make in so long as the change and/or modification falls within the scope and intent of the appended claims. For example, the aforesaid electric motor 11 can be replaced with an air or even with a hydraulic motor, if it is so desired.

What I now claim as new and desire to secure by Letters Patent as set forth in the US. Code 35 Patents and its Amendments is:

l. A powered hand tool for working on surfaces, said tool having a longitudinal axis and a rear portion including a motor and a hand grip, said hand grip being generally cylindrical in shape and extending generally parallel to said longitudinal axis, a tool support member connected with the forward end of said hand grip, said tool support member having a front end portion extending generally perpendicular to said longitudinal axis, two tool holder members mounted on said front end portion of said tool support member for sliding movement relative to said tool support member along a common axis of reciprocation perpendicular to said longitudinal axis, said two tool holder members being arranged end-to-end along said axis of reciprocation, two tools each having an elongated work engaging face and each associated with a respective one of said tool holder members, means for releasably fastening each of said tools to its associated one of said tool holder members with its work engaging face facing downwardly and oriented parallel to said axis of reciprocation, and drive means connected between said motor and both of said tool holder members for simultaneously reciprocating said two tool holder members along said axis of reciprocation and in such a manner that said tool holder members move in opposite directions along said axis of reciprocation so as to repetitively move away from and toward each other.

2. A powered hand tool as defined in claim 1 further characterized by said motor being connected to and extending rearwardly from the rear end of said hand grip, said motor including a drive shaft extending forwardly through said hand grip.

3. A powered hand tool as defined in claim 2 further characterized by said drive means including a pair of drive mechanisms carried by said tool support member for converting rotary motion to reciprocating motion and each associated with a respective one of said tool holder members, each of said latter two mechanisms having a rotary input member drivingly connected with said output shaft of said motor. 

1. A powered hand tool for working on surfaces, said tool having a longitudinal axis and a rear portion including a motor and a hand grip, said hand grip being generally cylindrical in shape and extending generally parallel to said longitudinal axis, a tool support member connected with the forward end of said hand grip, said tool support member having a front end portion extending generally perpendicular to said longitudinal axis, two tool holder members mounted on said front end portion of said tool support member for sliding movement relative to said tool support member along a common axis of reciprocation perpendicular to said longitudinal axis, said two tool holder members being arranged end-to-end along said axis of reciprocation, two tools each having an elongated work engaging face and each associated with a respective one of said tool holder members, means for releasably fastening each of said tools to its associated one of said tool holder members with its work engaging face facing downwardly and oriented parallel to said axis of reciprocation, and drive means connected between said motor and both of said tool holder members for simultaneously reciprocating said two tool holder members along said axis of reciprocation and in such a manner that said tool holder members move in opposite directions along said axis of reciprocation so as to repetitively move away from and toward each other.
 2. A powered hand tool as defined in claim 1 further characterized by said motor being connected to and extending rearwardly from the rear end of said hand grip, said motor including a drive shaft extending forwardly through said hand grip.
 3. A powered hand tool as defined in claim 2 further characterized by said drive means including a pair of drive mechanisms carried by said tool support member for converting rotary motion to reciprocating motion and each associated with a respective one of said tool holder members, each of said latter two mechanisms having a rotary input member drivingly connected with said output shaft of said motor. 